Squashed commit of the following:

commit 6819b9dc3d8be4a57dc90a353a116dcaf730b9bb
Merge: a15feb5 4855881
Author: Jari Oksanen <jari.oksanen@oulu.fi>
Date:   Wed Oct 29 10:04:10 2014 +0200

    Merge pull request #65 from jarioksa/dollar-and-data-usage

    Dollar and data usage

commit a15feb54164ea48042d6a7f8582701979376d56f
Merge: bb4b8bd 5af6b9d
Author: Jari Oksanen <jari.oksanen@oulu.fi>
Date:   Wed Oct 29 10:03:21 2014 +0200

    Merge pull request #63 from jarioksa/swsh-samp-works-with-double

    swsh_samp null models can be used with non-integer quantities

commit 5af6b9d26fd220d1ec314a8de40336fd32939478
Author: Jari Oksanen <jari.oksanen@oulu.fi>
Date:   Tue Oct 28 18:21:04 2014 +0200

    Further clarification of swsh methods, like suggested by Peter Solymos

commit 485588172ea06f402b84f0e0b705845e49aeb082
Author: Jari Oksanen <jari.oksanen@oulu.fi>
Date:   Tue Oct 28 16:07:33 2014 +0200

    clean up edits

commit 1027a101b7f77c3dfaac8fe55910019b2400b8f5
Author: Jari Oksanen <jari.oksanen@oulu.fi>
Date:   Tue Oct 28 15:56:04 2014 +0200

    ordisurf has formula & data=, it does not need with()

commit f4543bed4c83603fc6fe6e608c4ec1cd44485ac9
Author: Jari Oksanen <jari.oksanen@oulu.fi>
Date:   Tue Oct 28 15:44:43 2014 +0200

    Use residuals(x) instead of x$residuals in permatfull examples

commit 5d51dc282c4d7932374c9b144ff104ef184f0b87
Author: Jari Oksanen <jari.oksanen@oulu.fi>
Date:   Tue Oct 28 15:42:02 2014 +0200

    Remove dollars from mrpp and multipart examples

commit def279b08ed4aa1233674d6ec68a0b6db2dd8a9c
Author: Jari Oksanen <jari.oksanen@oulu.fi>
Date:   Tue Oct 28 15:35:06 2014 +0200

    Remove $ from clamtest example

commit 4ba8c7e6116daec96ba7efa826bf8c67dcba6e76
Author: Jari Oksanen <jari.oksanen@oulu.fi>
Date:   Tue Oct 28 15:29:44 2014 +0200

    Avoid some $ signs in adonis examples

commit a1eaa183e10ea54f2644484d934855e43a2d7581
Author: Jari Oksanen <jari.oksanen@oulu.fi>
Date:   Tue Oct 28 15:25:41 2014 +0200

    Avoid $ with data frame, and force asp=1 in plotting maps of points

commit 78bf998d0d9e1033e791dc2efb0382761005b3b5
Author: Jari Oksanen <jari.oksanen@oulu.fi>
Date:   Tue Oct 28 14:35:16 2014 +0200

    swsh_samp null models can be used with non-integer quantities

    swsh_samp, swsh_samp_c and swsh_samp_r null models shuffle original
    cell values and can also be used with non-integer data. They were
    unnecessarily restricted to integers. The swsh_both models
    redistribute individuals among non-zero cells and can only be used
    with integer values.

commit bb4b8bd0df28072e3aeb39be4521f717e06468ee
Author: Jari Oksanen <jari.oksanen@oulu.fi>
Date:   Mon Oct 27 11:05:54 2014 +0200

    remove refs to R 2.14.0 in man/: we depend on later version of R

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/vegan@2905 edb9625f-4e0d-4859-8d74-9fd3b1da38cb